Один из углов треугольника равен сумме двух других. Докажите, что данный треугольник прямоугольный.

В каких рядах химические элементы расположены в порядке усиления кислотных свойств их летучего соединения с водородом?

F – Cl – Br

As – P – N

N – O – F

Se – S – O

Cl – S – P

Сочинение на тему мой первый цветок

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At abot two o'clock on __ cold winter morning __ doctor drove miles to __ telephone call. When he reached __ place, __ man who called him in said, '' __ doctor, I must have strained myself. I haven't got __ sore throat, I'm not running __ temperature, but I'm suffering from __ terrible feeling that __ death is near.'' __ doctor felt __ man's pulse, examined him and took __ temperature.

"Have you made you wil?" he asked at once. "Why, no, __ doctor," __ man looked frightened. "Oh, __ doctor, it can't be true, can it? You must prescrible __ medicine for me."

"Have you got any children? Send for them at once. Your father, too should be called, your..."" Isay, __ doctor, do you really think I'm going to die?"

__ doctor looked at him carefully. "No, I don't," he replied. "You are as fit as anythink like this."